So what's this supreme being they worship
There is no "worshipping" done in Masonry. Masonry encourages men to worship a Supreme Being of their choice, and regularly participate in worship services (church, mosque, etc).
I heard stories about masons killing other people because they were representing being a mason fraudulently. He was a pretty reilable source.
Masonry discourages its members from causing any harm to anyone. And "taking light" is discouraged among the GOOD members.
Personally, if someone tries to take my possessions, that's called stealing. Good luck explaining that to the judge.